Just a shot in the dark here, but do you have ambient mode enabled? (that annoying glow light around the video). I’ve read from various people that it can use an insane amount of cpu on some devices. Disabling it fixed the performance issues they faced.

But if you’re worried about locale, you can’t assume people use the string “Saturday” to describe Saturday either. That solution only works in English.

That only works if you’re using the website. I’m in sync and just want it to open in the YouTube app.